This striking astronaut photo shows a unique chain of three atolls lined up side-by-side off the coast of Australia. The oval islands were once part of a colossal coral system that rivaled the Great ...

One sunny morning last year, Lawrence Scheele wandered down to his local beach for a swim — something he does most days.

From Tasmania to the Torres Strait, Australia and its external territories comprise 8,222 islands scattered throughout the ...

A surprising discovery has been made inside the body of an apex predator hooked at the southern end of the Great Barrier Reef ...

A 2015 satellite photo captured a series of stunning "von Kármán vortices" swirling off Madeira and the Canary Islands. The giant swirls are collectively one of the best examples of this ...

Northern Territory residents have been rocked by a strong offshore earthquake which has rattled the Top End. Geoscience ...

A vast bloom of toxic algae is killing more than 200 species of marine life off the southern coast of Australia, scientists and conservation groups ...

A vast bloom of toxic algae is killing more than 200 species of marine life off the southern coast of Australia, scientists and conservation groups say. The algae—Karenia mikimotoi—appeared in ...